Pictured above is a 1937 advertising mailer from the Arps Corporation featuring their Super Snow Bird rear tracked conversion kits for Model A and early V8 Fords.
What is especially interesting is the story and photos of Commander Byrd's second antarctic expedition using the Model A Ford with the Arp's conversions.
It also claims over 70 miles per hour speed!
Yikes, hang on!
Shown above are some of the mechanical details of the conversion, including front skids, rear tracks and wheels, and axle gear reduction.
Note the optional overdrive transmission in the torque tube, not unlike a modern Mitchell overdrive!